Zamil CX SERIES Installation, Operation & Maintenance Manual - Trouble Shooting Chart
1. Close start or disconnect switch
2. Replace fuse
3. Refer to electrical section
4. Repair or replace control
5. Relocate control
6. Check wiring against diagram
7. Replace or relocate
8. Trace control circuit with wiring diagram & repair
9. Replace the compressor with all precautions
1. Check wiring against diagram
2. Determine reason and correct
3. Determine reason and replace
4. Determine reason and correct, replace if necessary
5. Replace compressor
6. Replace compressor
7. Check crank case heater
8. Unequilized pressure in the system
1. Check wiring against diagram
2. Determine reason and correct
3. Determine reason and correct, replace if necessary
4. Determine reason and replace
5. Check discharge shut off valve, possible
overcharge, or insufficient cooling on condenser
6. Replace compressor
7. Replace compressor
1. Check wiring diagram. Check for added fan motors,
pumps, etc.connected to wrong side of protector
2. Determine the reason and correct
3. Check current, replace protector
4. Determine reason and replace
5. Check airflow across the condenser coil,
restrictions in refrigeration system
6. Check for possibility of misapplication. Use stronger unit
7. Check refrigerant charge (fix leak), add if necessary
8. Replace compressor
1. Check the cause
2. Differential set too close - widen
3. a. Check airflow to the condenser correct
b. Reduce refrigerant charge
c. Purge
4. a. Fix leak, add refrigerant
b. Replace device
1. Fix leak, add charge
2. Clean contacts or replace control
3. Determine the fault and correct
4. Replace with larger system
5. Defrost
6. Determine location and remove
7. Clean condenser
8. Clean or replace
1. Check for dirt or lint on coil
2. Clean or replace. Clean filter periodically
3. Check system pressure. Take superheat
reading. Add refrigerant
4. Check for dirty air filter or loose belt
5. Check for warm distributor tube
6. Check for restriction in lines/improve liquid line
pressure by proper charging or installing fan
cycling switch,etc.
1. Line disconnect switch open
2. Fuse removed or blown
3. Overload protector tripped
4. Control stuck in open position
5. Control off due to cold location
6. Wiring improper or loose
7. Thermostat defective or improperly installed
8. Control circuit open
9. Burned/open circuit motor winding
1. Improperly wired
2. Low voltage to unit
3. Starting capacitor defective
4. Relay failing to close
5. Compressor motor has a winding open or shorted
6. Internal mechanical trouble in compressor
7. Liquid refrigerant in compressor
8. High discharge pressure
1. Improperly wired
2. Low voltage to unit
3. Relay failing to open
4. Run capacitor defective
5. Excessively high discharge pressure
6. Compressor motor has a winding open or shorted
7. Internal mechanical trouble in compressor stuck up or frozen
1. Additional current passing through overload protector
2. Low voltage to unit (or unbalanced if three phase)
3. Overload protector defective
4. Run capacitor defective
5. Excessive discharge pressure
6. Suction pressure too high
7. Compressor too hot, return gas hot
8. Compressor motor has a winding shorted
1. Overload protector
2. Thermostat
3. High pressure cut-out due to:
a. Insufficient air
b. Overcharge
c. Air in system
4. Low pressure cut-out due to:
a. Undercharge
b. Restriction in expansion device
1. Shortage of refrigerant
2. Control contacts stuck or frozen closed
3. Refrigerated or air conditioned space has exc-
essive load or poor insulation
4. System inadequate to handle
5. Evaporator coil iced
6. Restriction in refrigeration system
7. Dirty condenser
8. Filter dirty
1. Restricted airflow
2. Dirty air filter
3. Short of refrigerant
4. Low air volume
5. Restricted distributor tube
6. Restricted liquid line/low liquid line pressure
Compressor will not start, no hum.
Compressor will not start, hums but
trips on overload protector
Compressor starts, but does not switch
off the start winding
Compressor starts and runs, but short
cycles on overload protector
Unit runs OK, but short cycles
frequently
Unit operates Continuously
Evaporator ices up
TROUBLE SHOOTING CHART
SYMPTOM
CAUSES
CHECK & CORRECTIVE MEASURE
17